Table 2.
Organ | 64Cu/NOTA-monomer | 64Cu/NOTA-dimer 2 | |||
---|---|---|---|---|---|
30 min | 30 min | 120 min | |||
Unblocked | Blockeda | Unblocked | Unblocked | Blockeda | |
Blood | 1.35 ± 0.47 | 12.72 ± 3.42 | 3.13 ± 0.67 | 1.34 ± 0.15 | 3.32 ± 2.78 |
Plasma | 2.48 ± 0.63 | 21.69 ± 6.16 | 5.27 ± 1.27 | 2.45 ± 0.27 | 6.14 ± 4.89 |
Adrenal | 4.29 ± 1.13 | 16.57 ± 0.37 | 9.23 ± 5.01 | 11.56 ± 4.91 | 3.63 ± 2.43 |
Fat | 0.65 ± 0.54 | 3.22 ± 4.29 | 1.86 ± 0.81 | 0.68 ± 0.61 | 3.46 ± 2.74 |
Kidney | 10.42 ± 1.29 | 75.13 ± 36.20 | 17.02 ± 6.24 | 26.37 ± 8.13 | 23.00 ± 5.37 |
Spleen | 1.63 ± 1.82 | 3.29 ± 0.16 | 5.31 ± 1.43 | 5.50 ± 2.61 | 3.31 ± 0.95 |
Pancreas | 5.10 ± 2.50 | 4.57 ± 2.65 | 4.60 ± 0.57 | 13.35 ± 7.38 | 1.43 ± 0.61b |
Liver | 5.38 ± 8.12 | 8.12 ± 0.70 | 41.79 ± 5.58 | 23.11 ± 2.36 | 12.20 ± 2.78b |
Heart | 1.05 ± 0.91 | 4.65 ± 0.33 | 4.42 ± 1.59 | 2.68 ± 0.13 | 1.58 ± 0.80 |
Lungs | 1.77 ± 1.28 | 14.26 ± 1.58 | 7.22 ± 2.73 | 5.07 ± 1.58 | 34.42 ± 23.31 |
Muscle | 0.40 ± 0.33 | 3.45 ± 2.06 | 1.59 ± 1.16 | 1.13 ± 0.62 | 1.41 ± 0.98 |
Bone | 0.43 ± 0.46 | 1.52 ± 0.58 | 0.78 ± 0.21 | 0.83 ± 0.19 | 1.15 ± 0.44 |
Brain | 0.08 ± 0.07 | 0.63 ± 0.09 | 0.38 ± 0.06 | 0.22 ± 0.05 | 0.16 ± 0.09 |
Tumor | 1.79 ± 0.46 | 4.82 ± 0.91 | 3.95 ± 0.26 | 6.28 ± 2.87 | 3.25 ± 1.15 |
Tumor/blood | 1.49 ± 0.41 | 0.38 ± 0.01b | 1.39 ± 0.30 | 4.09 ± 1.79 | 1.04 ± 0.60b |
Tumor/muscle | 7.42 ± 3.17 | 1.59 ± 0.44b | 3.95 ± 1.98 | 4.46 ± 1.86 | 2.31 ± 1.46 |
Tumor/liver | 2.07 ± 1.13 | 0.60 ± 0.13 | 0.10 ± 0.01 | 0.22 ± 0.07 | 0.24 ± 0.09 |
Tumor/kidney | 0.17 ± 0.04 | 0.07 ± 0.01b | 0.28 ± 0.09 | 0.22 ± 0.11 | 0.12 ± 0.03 |
Tumor/pancreas | 0.44 ± 0.17 | 1.18 ± 0.32b | 0.89 ± 0.11 | 0.36 ± 0.09 | 1.80 ± 0.39b |
Biodistribution and ratios are at 30 and 120 min post-injection. aBlocked by injecting 0.1 μmol of non-radiolabeled peptide together with the radiopeptide. bCo-injection significantly lowered the uptake of the same organ for the corresponding tracer (p < 0.05).